JPH10215215A - Communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the communication equipment that accurately receives data from a conventional digital wired line in a base station that performs data transmission reception with a mobile station by adopting the TDMA-TDD system. SOLUTION: A base station 2 is provided with a data reception register 21 that receives data from a digital wired line 3 for a prescribed period, a storage means 22 that writes and stores the received data in a write timing for a prescribed period, a 1st register 23 that latches data till the data write is enable in the storage means 22, a 2nd register 24 that prevents the data in the 1st register 23 from being overwritten, a reception enable signal generating means 25 that generates a signal representing a data reception enable state, and an internal counter 26 that provides a number to a reception request signal which is sent with the data based on the reception enable signal, and the reception/giving of the data from the 2nd register 24 to the storage means 22 via the 1st register 23 is controlled, based on the number.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a TDMA-TDD.
The present invention relates to a communication device that transmits and receives data according to a method.

[0002]

2. Description of the Related Art Conventionally, when data is received from a general digital wired line at a base station of a communication network that transmits and receives data to and from a mobile station according to the TDMA-TDD system, the base station side becomes the master and the data from the digital wired line is received. The reception timing is determined by the base station itself, and reception is performed based on the determined timing. That is, the data is received by the base station regardless of the operation status of the digital wired line.

[0003]

However, in the communication device having the above configuration, the base station side and the digital wired line are asynchronous, so that data transmitted from the digital wired line can be received by the base station. Before the new data is transmitted from the digital wired line, the data transmitted earlier from the digital wired line and received at the base station is overwritten by the newly transmitted data from the digital wired line, There has been a problem that a problem such as a loss of data received at the base station occurs.

[0004] The present invention has been made in view of the above points, and it is an object of the present invention to provide a general digital cable in a base station of a communication network for transmitting and receiving data to and from a mobile station by a TDMA-TDD system. An object of the present invention is to provide a communication device capable of receiving data accurately without receiving missing data when receiving data from a line.

[0005]

According to the first aspect of the present invention,
A plurality of mobile stations, a base station for transmitting and receiving data to and from the mobile stations according to the TDMA-TDD scheme, and a digital wired line for transmitting and receiving data between the base station and another communication network; The station has a data receiving register for receiving data transmitted from the digital wire line at predetermined intervals, and temporarily stores the data received by the data receiving register at a write timing generated at a predetermined period. A storage unit that is provided between the data reception register and the storage unit, when data is transferred from the data reception register to the storage unit until data can be written in the storage unit. A first register for holding data; and a first register provided between the first register and the data receiving register. The data held in the first register is temporarily held in order to prevent the data held in the register from being overwritten by the data newly received in the reception register before being written into the storage means. A second register; reception permission signal generating means for generating a reception permission signal indicating that data from the digital wired line can be received at the base station; and data from the digital wired line based on the reception permission signal. And an internal counter for assigning a reception number to a reception request signal transmitted together with the reception request signal, wherein a timing of data transfer from the second register to the first register based on the reception number and the first register Controlling the timing of data transfer from the memory to the storage means. Than it is.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a communication device according to an embodiment of the present invention. 1 is a mobile station group, 2 is a base station, and 3 is a digital wired line.

[0007] The mobile station group 1 includes mobile stations 10 to 13. The base station 2 includes a register 21 for data reception, a storage unit 22, a first register 23, a second register 24, a reception permission signal generation unit 25, and an internal counter 26.

[0008] The mobile station group 1 and the base station 2 are connected by TDMA-T
Data transmission and reception are performed by the DD system. Each of the mobile stations 10 to 13 transmits and receives data to and from the base station 2 according to the assigned slot. The number of mobile stations 10 to 13 that transmit / receive data to / from one base station 2 is 4
It is not limited to one.

The digital wired line 3 is a line used when communicating with another communication network 4 such as another base station.

Hereinafter, mobile stations 10 to 13 from base station 2
The transmission cycle of the data transmitted to the base station 2 from the digital wired line 3 to the base station 2 is 125 μsec. If base station 2 is 4
When data is transmitted and received to and from two mobile stations 10 to 13, two slots for transmission and reception are required for each of the mobile stations 10 to 13.
It occurs every μsec. That is, the transmission timing from the digital wired line 3 to the base station 2 occurring in one slot is five times. However, each transmission cycle is not limited to this value.

The data receiving register 21 receives data transmitted from the digital wired line 3 every 125 μsec.

The storage means 22 stores the data reception register 2
1 and is temporarily stored every time data of one slot is transmitted to the mobile station group 1, that is, at a write timing generated in a period of 625 μsec. 125 μsec from digital wired line 3
Since data is transmitted every time, five times of data transmitted from the digital wired line 3 are written to the storage means 22 at one time.

The first register 23 is provided between the data reception register 21 and the storage means 22. When data is transferred from the data reception register 21 to the storage means 22, the data is stored in the storage means 22. The data transmitted from the digital wired line 3 is accumulated until writing becomes possible. From the signal transmission cycle from the digital wired line 3 and the generation cycle of the write timing to the storage means 22, the register only needs to have a capacity enough to accumulate five times of data transmitted from the digital wired line.

The second register 24 stores the first register 2
3 and the data reception register 21 for storing the data stored in the reception register 21. The data held in the first register 23 is newly stored in the storage unit 22 before being written to the storage unit 22. To receive register 2
1 prevents overwriting by the received data.

The reception permission signal generating means 25 generates a reception permission signal indicating that data from the digital wired line 3 can be received at the base station 2.

The internal counter 26 assigns a reception number to a reception request signal transmitted together with data from the digital wired line 3 based on the reception permission signal. Note that the generation cycle of the reception request signal is 125 μsec. In the present embodiment, the reception number is assigned so that the reception request signal received by the base station 2 immediately after the generation of the reception permission signal is the second. Hereinafter, the operation of sequentially assigning the reception number to the generated reception request signal and adding the number 1 to the reception request signal generated next to the reception request signal numbered 5 is repeated. The reason why the reception numbers 1 to 5 are sequentially assigned is that the number of times the reception permission signal is generated in one slot is five in this embodiment.

Next, the operation of this embodiment will be described. FIG.
FIG. 5 is a diagram showing a generation timing of a reception request signal, a writing timing to the storage unit 22 at the time of turning on the power in the base station 2, and a generation timing of the reception permission signal. The reception number added to the data reception request signal is the reception number given by the internal counter 26. The reception request signal has a period of 125 μsec,
It is assumed that the write cycle to No. 2 occurs at a cycle of 625 μsec.

The timing for writing to the storage means 22 and the timing for generating the reception permission signal have a certain margin (hereinafter, referred to as a margin).
In this case, the data reception request signal is generated between the generation margins (in the case of FIG. 2A) and the data reception request signal is not generated between the generation margins (FIG. 2). (Case (b)).

The operation in the case of FIG. 2A will be described. When the reception permission signal is generated, data is sequentially stored in the first register 23 from data (hereinafter, referred to as second data) received by the base station 2 together with the reception request signal to which the second reception number is assigned. Then, after the fifth data is received, the data stored in the first register 23 is written to the storage unit 22. Hereinafter, the operation of sequentially storing the data in the first register 23 from the first data and writing the data to the storage unit 22 when the fifth data is written is repeated.

Next, the operation in the case of FIG. 2B will be described. In the case of FIG. 2B, similarly to the case of FIG. 2A, when the reception permission signal is generated, the data is accumulated in the first register 23 in order from the second data. Next, the first data is accumulated in the first register 23 via the data receiving register 21. In the present embodiment, when the fifth data is in the first register 23, The first data is stored in the second register 24 and is not written into the first register 23. When the data in the first register 23 is written to the storage means 22, the data stored in the second register 24 is passed to the first register 23, and the data up to the fifth data is sequentially stored in the first register 23. At 23, control for accumulation is performed. As a result, it is possible to prevent the first data stored in the first register 23 from being overwritten by the first data input later.

In this embodiment, the second reception number is assigned to the data reception request signal generated after the reception permission signal.
Is not overwritten by data received later.

According to the present embodiment, when data is received from a general digital wired line 3 at a base station 2 that transmits and receives data to and from a mobile station group 1 according to the TDMA-TDD scheme, the previously received data is It is possible to receive data accurately without causing loss of received data caused by overwriting by data received later.

[0023]

As described above, according to the first aspect of the present invention, a plurality of mobile stations, a base station for transmitting and receiving data to and from the mobile station by the TDMA-TDD system, and other communication between the base station and the base station. The base station includes a data receiving register for receiving data transmitted from the digital wired line at predetermined intervals, and a data receiving register for receiving data transmitted from the digital wired line at predetermined intervals. Storage means for temporarily storing written data at a write timing generated at a predetermined cycle, and a data transfer register provided between the data reception register and the storage means when data is transferred from the data reception register to the storage means. A first register for holding data until data can be written in the storage means, and a first register and a data reception register In order to prevent the data held in the first register from being overwritten by the data newly received in the receiving register before the data held in the first register is written into the storage means, the data held in the first register is temporarily stored. A second register for holding, a reception permission signal generating means for generating a reception permission signal indicating that data can be received from the digital wired line in the base station, and data from the digital wired line based on the reception permission signal together with data from the digital wired line. An internal counter for assigning a reception number to the transmitted reception request signal, and a timing of data transfer from the second register to the first register based on the reception number, and a timing of data transfer from the first register to the storage means. Since the timing of data transfer is controlled, the TDMA-
When data is received from a general digital wired line at a base station of a communication network that transmits and receives data to and from a mobile station according to the TDD scheme, no matter what timing a data reception request signal occurs, the data received first Is not overwritten by data received later, so that a communication device capable of receiving data accurately without causing loss of received data can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a communication device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a generation timing of a reception request signal, a writing timing to a storage unit when power is turned on in a base station, and a generation timing of a reception permission signal according to an embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 mobile station group 2 base station 3 digital wired line 4 communication network 10 to 13 mobile station 21 data reception register 22 storage means 23 first register 24 second register 25 reception permission signal generation means 26 internal counter

Continuing on the front page (72) Inventor Kazuyasu Yamane 1048 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd.

Claims (1)

[Claims] 1. A mobile station comprising: a plurality of mobile stations;
The base station includes a base station that transmits and receives data according to the TDD method, and a digital wired line that transmits and receives data between the base station and another communication network. A data reception register for receiving data transmitted to the memory, and a storage unit for temporarily storing the data received by the data reception register at a write timing generated at a predetermined cycle,
When data is transferred from the data reception register to the storage means provided between the data reception register and the storage means, data is held until data can be written in the storage means. 1 and the data held in the first register provided between the first register and the data receiving register is newly received in the receiving register before being written to the storage means. A second register for temporarily holding data held in the first register to prevent overwriting by data, and indicating that data from a digital wired line can be received at the base station Receiving permission signal generating means for generating a reception permission signal; and data from the digital wired line based on the reception permission signal. And an internal counter for assigning a reception number to a reception request signal transmitted together with the reception request signal, wherein a timing of data transfer from the second register to the first register based on the reception number and the first register A communication device for controlling a timing of transferring data from the storage device to the storage means.